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The Goodman B4022700 3-inch in-shot burner is the genuine OEM combustion component for ADS81155CNA gas furnaces and compatible Goodman/Amana models. The in-shot burner directs the gas-air mixture into the heat exchanger tube, where it ignites to produce the heat your system delivers to the home. A cracked, rusted, or sooted burner causes rough ignition, delayed light-off, yellow flame, and rollout faults — replacing it restores a clean, even blue flame and reliable starts.
This is a true OEM Goodman burner machined to factory port and flame-rod geometry, so flame sensing and ignition timing stay within spec. Aftermarket burners often vary in port size and length, which can throw flame-sense errors or uneven heating. For combustion components we recommend OEM for safety and a clean light-off.
Moderate — burners are accessed behind the gas manifold and typically replaced as a set. Shut off gas and power before service. Recommended for HVAC technicians or experienced DIYers familiar with combustion components.